Control interaction analysis of hybrid system with grid-following and grid-forming inverters based on admittance decomposition

IF 5 2区工程技术 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC

International Journal of Electrical Power & Energy Systems Pub Date : 2024-10-16 DOI:10.1016/j.ijepes.2024.110267

Yang Wang , Liang Ruan , Mengling Yang , Xianyong Xiao , Song Chen , Oriol Gomis-Bellmunt

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引用次数: 0

Abstract

In high renewable penetrated power systems, both grid-forming (GFL) and grid-following (GFM) inverters play an important role in maintaining the system stability and economic operation. However, the two kinds of inverters exhibit distinct dynamic characteristics; thus, interconnecting them in a close electrical distance may cause the stability concern. In this paper, the small-signal stability of a hybrid system with GFM and GFL inverters is investigated. Based on the idea of admittance decomposition, this paper first decomposes the overall admittance of two inverters into several sub-admittances corresponding to different control loops and circuit components. Then an in-depth analysis is conducted to reveal the dynamic interaction between multiple time-scale control loops based on decomposed admittances. Moreover, the impact of the line impedance, the grid strength, and the power flow on the system stability is analyzed and a security region is further developed. The accuracy and effectiveness of the analysis are validated through eigenvalue analysis, simulations and hardware in the loop based experiments.

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基于导纳分解的电网跟随和电网形成逆变器混合系统的控制交互分析

在可再生能源渗透率较高的电力系统中，并网型（GFL）和并网跟随型（GFM）逆变器在维持系统稳定性和经济运行方面发挥着重要作用。然而，这两种逆变器具有不同的动态特性，因此在电气距离较近的情况下将它们互连可能会引起稳定性问题。本文研究了带有 GFM 和 GFL 逆变器的混合系统的小信号稳定性。基于导纳分解的思想，本文首先将两个逆变器的总导纳分解为多个子导纳，分别对应于不同的控制回路和电路元件。然后，根据分解后的导纳进行深入分析，揭示多个时间尺度控制环路之间的动态相互作用。此外，还分析了线路阻抗、电网强度和功率流对系统稳定性的影响，并进一步开发了一个安全区域。通过特征值分析、模拟和基于硬件的环路实验，验证了分析的准确性和有效性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Electrical Power & Energy Systems 工程技术-工程：电子与电气

CiteScore

12.10

自引率

17.30%

发文量

1022

审稿时长

51 days

期刊介绍： The journal covers theoretical developments in electrical power and energy systems and their applications. The coverage embraces: generation and network planning; reliability; long and short term operation; expert systems; neural networks; object oriented systems; system control centres; database and information systems; stock and parameter estimation; system security and adequacy; network theory, modelling and computation; small and large system dynamics; dynamic model identification; on-line control including load and switching control; protection; distribution systems; energy economics; impact of non-conventional systems; and man-machine interfaces. As well as original research papers, the journal publishes short contributions, book reviews and conference reports. All papers are peer-reviewed by at least two referees.